| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 4403 |
88.4%
|
| 2 | SOME DIFFICULTY | 476 |
9.6%
|
| 3 | A LOT OF DIFFICULTY | 45 |
0.9%
|
| 4 | CANNOT WALK 100 M/Y AT ALL | 10 |
0.2%
|
| Sysmiss | 49 |
1%
|